上海交通大学学报

上海交通大学学报（自然版）

• 机械工程 • 上一篇    下一篇

曲柄滑块机构中滑块输出位移的可靠性分析

同长虹1,2，黄建龙1
  

  1. （1.兰州理工大学 机电工程学院,兰州 730070； 2.兰州城市学院 机械监测与故障诊断研究所,兰州 730070）
  • 收稿日期:2009-10-26 修回日期:1900-01-01 出版日期:2010-12-31 发布日期:2010-12-31

Reliability Analysis of the Output Displacement for a SliderCrank Mechanism

TONG Changhong1,2，HUANG Jianlong1
  

  1. (1. College of MechanicalElectrical Engineering, Lanzhou University of Technology, Lanzhou 730070, China； 2. Institute of Mechanical Detection and Fault Diagnosis， Lanzhou City University, Lanzhou 730070, China)
  • Received:2009-10-26 Revised:1900-01-01 Online:2010-12-31 Published:2010-12-31

摘要： 建立了运动副磨损量的计算模型.通过机构的运动学和动力学分析计算运动副元素之间的接触力和相对运动速度，在运动副连续接触理论和各随机因素符合正态分布的假设下，建立了曲柄滑块机构滑块输出位移可靠度模型，利用编写的Matlab计算程序对所建立的模型进行了实例计算，得出了机构随着工作时间的延长运动副元素的磨损影响越突出的结论.所建的模型可以估算机构工作一定时间后的运动精度可靠度，也可以推算在给定要求下机构的工作寿命.

关键词: 曲柄滑块机构, 运动副, 磨损, 原始误差, 位移可靠性

Abstract: A model for calculating wearing capacity was established based on the exited wear theory and the research conclusions. The contact pressure and the relative velocity between shaft pin and paired hole in joints were calculated by analyzing a mechanism from its kinematics and dynamics. The reliability model of the output displacement for a slidercrank mechanism was set based on the two assumptions that the elements in a joints tally with the continual contacting model and all of the random factors to affect the motion accuracy tally with the normal distribution. An application case of the established model was calculated by using the designed MATLAB program. The results show that the wear influence on reliability of the output displacement of the mechanism is more clearly with the time longer and longer. The reliability can be calculated and also the operating life under the given demand for a mechanism can be estimated by using the established model in reverse.

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